低标号混凝土植筋连接界面抗剪性能试验研究
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摘要
北京前三门地区有一批建于20世纪70年代的鱼骨式剪力墙混凝土建筑。该批建筑修建时间较早,受经济与技术条件限制,剪力墙混凝土强度低,配筋率不满足现行建筑抗震规范要求,需要对原有结构通过增设混凝土墙体进行加固。原结构混凝土强度低于现行规范规定的可采用植筋技术的最低混凝土强度,不能直接按照现行规范进行设计。为了确定新旧混凝土墙体植筋连接界面的抗剪性能,本文设计了8个抗剪连接试件,对其进行推出试验研究。结果表明,对低标号混凝土使用植筋加固方法可行,植入的钢筋可承受较大剪力,能有效提高新旧墙体连接性能。
A group of concrete buildings which were constructed during 1970s are still used in Qiansanmen area of Beijing.As the buildings were built pretty early,their concrete strength is too low,and the steel reinforcement in the concrete wall is inadequate.In order to satisfy current seismic design standard for reinforced concrete structures,the buildings are needed to be retrofitted.But the grade of the concrete is lower than the current design's requirement of using planting steel technique.For getting the shear property of new and old concrete bonding with planting steel,8 specimens are tested.The test results show that the planting steel technique can be used in low grade of concrete,the shear property is good and can improve the connection between new and old shear wall.
A group of concrete buildings which were constructed during 1970s are still used in Qiansanmen area of Beijing.As the buildings were built pretty early,their concrete strength is too low,and the steel reinforcement in the concrete wall is inadequate.In order to satisfy current seismic design standard for reinforced concrete structures,the buildings are needed to be retrofitted.But the grade of the concrete is lower than the current design's requirement of using planting steel technique.For getting the shear property of new and old concrete bonding with planting steel,8 specimens are tested.The test results show that the planting steel technique can be used in low grade of concrete,the shear property is good and can improve the connection between new and old shear wall.
引文
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[7]韩菊红,赵国藩,张雷顺.新老混凝土粘结面断裂性能试验研究[J].土木工程学报,2003,(6):31~35Han Ju-hong,Zhao Guo-fan,Zhang Lei-shun.Experimental Research on Fracture Properities of Adherence for New to Old Concrete[J].China Civil Engineering Journal,2003(6):31~35(in Chinese)
[8]GB50367-2006,混凝土结构加固设计规范[S]GB50367-2006,Code for Retrofit Design of Concrete Structure[S](in Chinese)
[2]孙立富,高小旺.鱼骨式剪力墙结构抗震性能评估[J].工程抗震与加固改造,2009,(5):118~123Sun Li-fu,Gao Xiao-wang.Seismic Performance Evaluation of the Fish-bone Wall Structure[J].Earthquake Resistant Engineering and Retrofitting,2009,(5):188~123(in Chinese)
[3]郝锐坤,徐培福,黄宝清.底层大空间上层鱼骨式剪力墙结构十二层模型纵向拟动力试验研究[J].建筑科学,1986,(4):9~15Hao Rui-kun,Xu Pei-fu,Huang Bao-qing.Longitudinal Direction Pseudo Dynamic Test Research on a 12-story Fishbone Type Shear Wall Structure Model with Large Space Ground Floor[J].Building Science,1986,(4):9~15(in Chinese)
[4]钱稼茹,吕文,方鄂华.基于位移延性的剪力墙抗震设计[J].建筑结构学报,1999,(3):42~48Qian Jia-ru,Lv Wen,Fang E-hua.Displacement Ductility-based A Seismic Design for Shear Walls[J].Journal of Building Structures,1999,(3):42~48(in Chinese)
[5]李湛.钢筋混凝土结构改造加固设计的特点和应用[J].有色金属设计,2010,(2):36~39Li Zhan.Features of Transformation and Strengthening Design for Reinforced Concrete Structure and Its Application[J].Nonferrous Metals Design,2010,(2):36~39(in Chinese)
[6]肖成志,田稳苓,刘波,等.设置界面结构锚筋的新老混凝土粘结性能试验研究[J].建筑结构学报,2011,(1):75~81Xiao Zhi-cheng,Tian Wen-ling,Liu Bo,et al.Experimental Study on Bonding Properities of Young and Old Concrete with Constructional Steel Bar[J].Journal of Building Structures,2011,(1):75~81(in Chinese)
[7]韩菊红,赵国藩,张雷顺.新老混凝土粘结面断裂性能试验研究[J].土木工程学报,2003,(6):31~35Han Ju-hong,Zhao Guo-fan,Zhang Lei-shun.Experimental Research on Fracture Properities of Adherence for New to Old Concrete[J].China Civil Engineering Journal,2003(6):31~35(in Chinese)
[8]GB50367-2006,混凝土结构加固设计规范[S]GB50367-2006,Code for Retrofit Design of Concrete Structure[S](in Chinese)
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